<!DOCTYPE html>
<html class="reftest-wait">
<head>
<style type="text/css">
div {
 height: 20px; width: 100%;
 background-color: blue;
 vertical-align: bottom;
}
#block1 {
 margin-bottom: 15px;
}
#inline-block1 {
 margin: 25px 0 25px;
}
#inline-block2 {
 margin: 15px 0 15px;
}
#block2 {
 margin-top: 25px;
}
</style>
<script type="text/javascript">
function test() {
 document.getElementById('inline-block1').style.display = 'inline-block';
 document.getElementById('inline-block2').style.display = 'inline-block';
 document.documentElement.removeAttribute('class');
}
document.addEventListener('MozReftestInvalidate', test, false);
</script>
</head>
<body>
<div id="block1"></div>
<div id="inline-block1"></div>
<div id="inline-block2"></div>
<div id="block2"></div>
</body>
</html>
